After collecting more bones and pellets for a few months after I made the project, I decided it was time for another update. Since early-mid March, I have barely found any new pellets at its roost, so it might be using a different area of the park.
The owl continues to eat more mammals than birds. I have yet to find an herp bones in the pellets, but there's still the rest of spring and summer. After continually finding rufous eastern screech owl feathers throughout the months, I decided that it only ate 1 screech owl.

Observation Highlights:

This brown rat partial skull and other bones:

An almost complete northern short tailed shrew skull and other bones:

Many thanks to all of the identifiers!
@tfrench @galecyon @karakaxa @lizardking @zitserm @mbwildlife @paleoshrike @zugz @apgarm @featherenthusiast @porlanaturaleza @chewitt1 @kmccartney3521 @scar2004 @caterpillar511 @nflicker101 @lavenderosella

After collecting a lot of bones and pellets for a few months, I decided to make this project to make it easier to see what the great horned owl at Tamanend Park eats. It consists of bones from the pellets and feathers from dead birds found under its roost.

After creating the project, I decided compile all of the data so far, adjusting for duplicates. So far the owl eat more mammals than birds, and a slightly wider variety.

Overall, the owl only eats birds and mammals, but maybe that will change in the spring and summer, as most of my observations are from late fall and winter.

Observation Highlights:

A surprise observation, and my favorite so far, is this southern flying squirrel skull:

Another interesting observation is this partial skull from an eastern screech owl:

Many thanks to all of the identifiers!
@tfrench @galecyon @karakaxa @lizardking @zitserm @featherenthusiast @kmccartney3521 @mbwildlife @scar2004 @nflicker101